基于统一强度理论的预应力钢带加固混凝土柱轴压承载力计算  

Compression Strength calculation of reinforced concrete column retrofitted by prestressed steel strip based on the twin shear unified strength theory

作　　者：李宏志 祝红梅 刘举红 胡新伟 Li Hong-zhi;Zhu Hong-mei;Lui Ju-hong;Hu Xin-wei(Northwest Research Institute of Engineering Investigations and Design,Xi'an 710003,China;Shaanxi Gudu Engineering Supervision Company,Xi'an 710003,China)

机构地区：[1]西北综合勘察设计研究院,陕西西安710003 [2]陕西省古都工程监理公司,陕西西安710003

出　　处：《工程抗震与加固改造》2021年第3期126-130,共5页Earthquake Resistant Engineering and Retrofitting

摘　　要：为计算钢带加固混凝土柱的轴心受压承载力,基于双剪统一强度理论,考虑箍筋和预应力钢带对混凝土的双重约束作用,对柱中处于三向受力状态的混凝土进行分析,推出了预应力钢带加固混凝土柱的轴心受压承载力公式;预应力钢带加固混凝土柱的轴压承载力计算值与试验数据比较,吻合较好,验证了统一强度理论在预应力钢带加固混凝土柱轴压承载力计算中的适用性。To calculate the axial compressive capacity of concrete columns strengthened by the steel strip,based on twin shear unified strength theory,considering the constraint effect of stirrups and prestressed steel strip on concrete,to analyse the concrete in three direction stress state of the column,and the formula of axial compression bearing capacity of concrete column strengthened with prestressed steel strip is deduced. The calculation of the axial bearing capacity is compared with the test result of prestressed steel reinforced concrete column,and is in good agreement with the experimental data,so the applicability of twin shear unified strength theory in concrete column retrofitted by prestressed steel strip is verified.

关 键 词：预应力钢带 加固混凝土柱 双剪统一强度理论 轴压承载力 约束混凝土 

分 类 号：TU746[建筑科学—建筑技术科学] TU375.3